Improvement in tilt-hammers



PATRICK BREENQ Improvement in Tilt Hammers.

N0. 120,412. G' Fla Patented Oct. 31, 18.71.

y r GD CID i Af.. .1; '@PDI 1% if an W UNITED STATES PATRICK BREEN, OFAUBURN, NEW YORK.

IMPROVEMENT IN TILT-HAMMERS.

Specification forming part of Letters Patent No. 120,412, dated October31, 1871.

To all whom t may concern:

Be it known that I, PATRICK BREEN, of Auburn, in the county of Cayugaand State of New York, have invented an Improved Tilt-Ham mer 5 and I dohereby declare that the following is a full, clear, and exactdescription thereof, which will enable others skilled in the art to makeand use the same, reference being had to the accompanying drawingforming a part of this speciication, in which- Figure l represents a topview of my improved mechanism for operating tilt-hammers. Fig. 2 is aside view of the same. Figs. 3 and 4 are back views of the notched diskcarrying the operating cam. Fig. 5 is a face view of the same.

Similar letters of reference indicate correspon ding parts.

The object of this invention is to produce a mechanism to be connectedwith a tilt-hammer of suitable kind for retaining the drop on itsrebound and prevent it from falling again after the main stroke. Thepattering of the drop on its return stroke is, in many casesas, forinstance, in minting-injurious, spoiling the ine execution of the mainfall. To avoid this, I have arranged a peculiar cam, which acts on thehammer or drop: so as to catch it with a short arm on the rebound andprevent it from falling again. My invention consists in a newcombination of mechanism, whereby said cam. is ena-bled to act on thedrop, and in a new general arrangement of parts for moving or lockingsaid cam, as may be desired.

A in the drawing represents the shaft, which operates the mechanism. Ithas its bearings in a suitable frame, and carries at its end a disk, G,that hangs loose upon it. To the face of the disk Gis affixed the cam B,shown in Fig. 5. This cam is so disposed with reference to the axis ofthe shaft A that it forms a long arm, K, and a short arm, L, both beingat one side connected by a straight portion, b, and at the other side bya convex portion, c. H is a ratchet- Wheel, firmly mounted upon theshaft A directly back of the disk G. I is a `jointed pawl affixed to theback of the disk G. This pawl con- L in Figs. 3 and 4. A spring, c,bears against the lower link f oi' the pawl, with the tendency ofholding the same in contact with the edge of' the ratchetwheel. If, asin Fig. 3, the latter is thus locked to the disk G, the shaft willimpart rotary motion to the disk G and cam B, when such motion is to bearrested. A latch, c which, by a rod, F, is connected with a treadle orother device, is permitted to drop into a notch of the disk G, as inFig. 4, a spring, g, bearing upon it to force it down into said notch.The latch a will in this position bear against the upper link c of thejointed pawl and swing it so as to carry the lower link f clear of theratchet-wheel. The disk will consequently not only be locked by the.latch, but also disengaged from the shaft, not to receive fiuther motiontherefrom, whenever the latch is permitted to drop. The spring g is somuch stronger than the spring c that it will overcome the same wheneverthe latch is free to drop into the notch; but when, by means of thedevice connected with F, the catch is raised out ofthe notch, the springc is again free to hold the pawl against the ratchet-wheel and lock thecam and disk to the shaft. The cam B bears upon one end of a beam, (l,whose other end works under a lever, D, which is connected with the dropE of suitable kind; when, by means ofthe convex part d of the cam, thesame rotating in the direction of the arrow, shown in Fig. 5, the leverC has been so swung as to raise the drop, the latter will, as the pointK of B reaches the lever G, be suddenly released, and fall upon the bedto produce the desired impression or other eiect. While the drop fallsthe cam continues to turn, its flat edge b not affecting the position ofthe lever O, until, at the rebound of the drop, the short arm L of thecam bears upon the beam C and thereby prevents the drop from redescend-1n In this manner the drop is always held up on its rebound and cannotpatter on the Work, 2. The combination of the latch a with the which itshaped properly by its main stroke or jointed p awl I, spring c,ratchet-Wheel H, fall. notched disk G, cam B, and shaft A, in the man-Hav'lng thus described my invention, I claim ner and for the purposespecified.

as new and desire to secure by Letters Patent.- PATRIOK BREEN.

l. rlhe combination of the cam B having the long arm K and short arm L,With the beam C Witnesses:

and lever D, for the purpose of arresting and BENJ. F. HALL,

holding up the drop E on its rebound, as speei- HENRY HALL. (60) fied.

